Sawmill feed mechanism



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Y. M JA E R l T d o M 0 fN\ SAWMILL FEED MEGHANISM.

No. 510,818. Patented Dec. 12, 1888.

THE NATIONAL umoaRAPruNa COMPANY.

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2. V.. M A H R Tu. T

SAWMILLk FEED MEGHANISM.

No. 510,818. Patented 1100. 12, 189,3.

. .inve/@tor Thomas .fi-Zea,

me NlmoNAl. LIfHoGRAFHmG COMPANV.

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NTTED STATES PATENT OFFICE.

THOMAS J. REAMY,-0F AUBURN, INDIAN.

SAWM'ILL FEED MECHANISM.

SPECIFICATION forming part of Letters Patent No. 510,818, dated December12, 1893.

Application filed December 23, 1891- Serial No. 416,003. (No model.)

To all whom t may concern.-

Be it known that I, THoMAs J. REAMY, a citizen of the United States,residing at Auburn, in the county of De Kalb and State of Indiana, haveinvented certain new and useful Improvements in Sawmill Feed Mechanism;and I do hereby declare the following to be a full, clear, and exactdescription 0f the invention, such as willv enable others skilled in theart to which it appert-ains to make and use the same.

My invention relates to an improvement in saw mill feed mechanism; andit consists in the construction and arrangement of parts which will befully described hereinafter, and partlcularly referred to in the claims.

The object of my invention is to provide a friction driving mechanismwhich is especlally applicable to saw mill carriages, and of theconstruction hereinafter shown and described, whereby great power isobtained, and the several parts adapted to be operated by a singlelever. i

Figure l, is a view in perspective of my invention in .the form adaptedto act as a feed mechanism for` saw mills. Only the frame work of mydevice and the parts essential to an understanding of the constructionand operation of same are shown and the driving pulleys are indicated bydotted lines. Fig. 2, 1s a plan view of same showing the driving pulleysin full lines but not showing the driving belts. Fig. 3, Sheet 2, is adetail in side elevation, showing disk broken away to better illustratethe construction of the friction pulley and levers for shifting it onits countershaft. This ligure shows the pulley and levers in dottedlines at the opposite end of the shaft. Fig. 4, Sheet 2, is a diagramshowing the construction of the system of levers by which the two disksare thrown into contact with the friction pulley. The dotted linesindicate the positions when the disks are in contact.

Similar lettersrepresent like parts throughout the several views of thedrawings.'

A is the base or frame work to which the other parts are attached.

B and B', are two shafts arranged so that `theirlongitudinal centerswill be'horizontally aligned. They are journaled in the boxes b, b andb', b', respectively.

C and C are metallic disks keyed to the inner ends of the shafts B and Brespectively so as to be rotated by the revolution of the shafts.

D, is a'pulley keyed'to the shaft B, and D is a like pulley keyed to theshaft B. Both of these pulleys are connected by belts with correspondingpulleys on the main driving shaft B2, one of the said belts, d, beingtwisted inv order to transmit a reverse movement to the pulley, D,'andthe other belt, d', being straight so as to cause the two shaftsandattached disks to revolve in opposite'directions as shown by the arrowsin Fig. 1.

E, is a counter shaft whose opposite ends are journaled by suitableboxes, e, to the bed plate or frame of the machine, and F, is a frictionpulley splined to the shaft, E, so that while both pulley and shaft mustrevolve together, the pulley may be shifted longitudinally upon theshaft.A By this construction, power will be transmitted to the frictionpulley by contact with the disks and the power will be transmitted toboth sides of the pulley at once with an equal pressure, that will becounteracting, in its result and relieve the shaft of the friction withits journal bearings, and from the tendency to spring out of alignment;and besides the foregoing advantages,

by using two disks the amount of contacting surface between the disksand the pulley will be doubled. The speed of the pulley, F, will bevaried by shifting its position on the shaft in a direction to or fromthe center, the greatest velocity being transmitted to the pulley whenit is nearest the edge of the disk and decreasing toward the center atwhich-point the pulley will remain stationary, and on passing the centerthe movement will again increase in rapidity toward the periphery butthe direction of revolution will be reversed.

It is not desired to limit this invention to any prescribed form oflevers for controlling the movements of the pulley on the countershaft,or for regulating the contact between the pulley and the disks, but asthe system of levers for this purpose as shown i-n the drawings hasproven very convenient and Ico efficient, a description thereof will nowbe given.

D2 is a continuation of the hub of the pulley F, and D2, is a collarsecured toit by means 5 of a set screw of otherwise.

DT is a loose collar between the collar D3 and the pulley.

II, is a bifurcated lever Whose bifurcated ends are connected pivotallywith the collar io D7 and whose opposite end is pivotally connected withthe link, H2, and the link is pivotally connected with the stationarybar or standard, IIS.

I, is a vertical rod having the horizontal i5 arm, 7i, secured to it soas to turn with the rod,

and h', is a hand lever also secured horizontally to the rod, l. Theconnecting bar, hl, is attached at one end to the lever Il, and at theother end to the arm, 71., and by a horizontal 2o movement of the handlever the pulley may be moved in a corresponding direction on the shaft.

J, is a yoke whose inner end is pivoted at, j', to the frame of themachine, and whose 2 5 outer end is connected by means of the slide K,Awith the bar or rod, I. To the sides of the yoke intermediate betweenthe two ends, the collar, j, encircling the projected end of the shaft,B, is pivotally secured, and the collars 3o t7'2 and js fastened to theshaft by set screws and placed on opposite sides of the loose collar, j,prevent longitudinal movement of the coll-ang" along the shaft. In likemanner the yoke, J2, is secured to the shaft. B', and is con- 35 nectedwith the vertical rod, I, bythe slide bar K only at a point severalinches below the point of attachment of the slide, K. The

standards L, one on each side of the vertical rod, I, are provided withguide boxes to re- 40 ceive the bars K and K', which pass through theboxes and are held from twisting or displacement, except longitudinally,by the boxes.

By bearing down on the hand lever, 7L', the

rod I will be forced out of vertical alignment and move the slide barsso as to force the shafts B and B' longitudinally toward .the center ofthe machine, and carry the disks in with it into contact with thefriction `pulley. By this construction both disks may be shiftedsimultaneously, and by a different movement of the same hand lever thepulley may be shifted upon the counter shaft.

I claiml. A friction driving mechanism comprising a central frictionwheel, two friction disks revolved in opposite directions, a single handlever adapted to be moved back and forth in two planes, intermediateactuating devices connecting the said lever with the said disks, wherebythe disks may be moved simultaneously to and from the friction wheelwhen the lever is moved in one plane, and operating devices connectingthe said lever with the friction wheel and adapted to move it to varyits speed when the said lever is moved in the other plane, substantiallyas set forth.

2. A friction driving mechanism comprising a shaft carrying a centralsliding friction wheel, a shaft at each side of the said wheel whichrevolve in opposite directions and adapted to move toward and away fromthe friction wheel, friction disks thereon, pivoted levers connectedwith the said sliding shafts, an operating lever adapted to have amovement in two planes, connections between the operating lever and thesaid pivoted levers for operating the sliding shafts when moved in oneplane, and connections between the said operating lever and the slidingfriction wheel for movingit when the operating lever is moved in theother plane, substantially as specified.

In testimony whereof I afig my signature in presence of two witnesses.

THOMAS J. REAMY.

IVitnesses:

Josnrn A. MINTURN, T. F. MEANY.

